Template for Python apps on Docker & Kubernetes

This template includes:

• a nginx server as frontend
• a small web service written in Flask
• a MySQL db backend
• basic starter configurations for both Docker & Kubernetes deployment

The application follows a Clean Architecture design.

Docker & Kubernetes

Docker Compose

1. Set environment variables & substitute your docker account as necessary:

   export APP_ENV=development or export APP_ENV=production
   export DOCKER_ACCT=vatie
   

   (for standard Windows command shell use set instead of export)

   or in Windows Powershell use:

   $env:APP_ENV = "development"
   $env:DOCKER_ACCT = "vatie"
   

2. Run docker-compose build

3. Run docker-compose up

Kubernetes - Usage

1. Run the following to add the database passwords as secrets:

   kubectl create secret generic db-passwords --from-literal=db-password='password' --from-literal=db-root-password='password'

   Note: These are simple passwords used for demo purposes only. Use strong passwords for real setup!

2. Start everything:

   kubectl create -f .k8s

3. Delete everything:

   kubectl delete -f .k8s

Local Development

Installation

In Linux, macOS or Windows WSL:

# Install Poetry
make setup

# Install app
make install

or using Windows Powershell / Command Prompt:

1. Download & install Poetry
2. Run installation:

   poetry install

Testing

# Run all tests
make test

# Run unit tests only
make unit-test

# Run functional tests only
make functional-test

Development & Debugging

1. You can run the Flask web service locally. The local configuration uses an in-memory db.

   # With Makefile (Linux, macOS or Windows WSL):
   make run-product-service
   
   # Or with Powershell / Command Prompt:
   poetry run python .\src\product_service\app.py --config config.yml

2. You can also run & debug the service directly in PyCharm or VSCode from app.py